4.3.1. Assumptions and Parameters

Try these first

1. 1.

   Define mass conservation in your own words.

   Hint

   Think about how this applies to a simple container.

2. 2.

   What is the Reynolds transport theorem?

   Hint

   Consider how it helps in analyzing forces in fluids.

3. 3.

   What does the mass conservation principle state?

   • A. Mass can be created
   • B. Mass cannot be designated
   • C. Mass inflow equals mass outflow

   Hint

   Think about a closed container.

4. 4.

   True or False: Momentum flux is not relevant in calculating forces exerted by fluids.

   • True
   • False

   Hint

   Consider how fluid movement impacts surfaces.

5. 5.

   Calculate the force required to maintain a flat plate's motion when equipped with a water jet of velocity 10 m/s and density of 980 kg/m3 striking perpendicularly. The jet area is 0.01 m².

   Hint

   Remember the fundamentals of force = mass times acceleration.

6. 6.

   Examine a scenario where a diverging jet of water is impacting two angles on a plate. How do you derive the resultant forces?

   Hint

   Use trigonometric functions to analyze the angles.